2002 Ford Taurus Repair Question
Ford Taurus Steering Problem
When you turn the steering wheel, you place a load on the engine , on the power steering line is a power steering switch, This informs the ECM to increase the IAC (idle air control) . You may have a problem with the IAC valve, but the sure way to do it is with a scan tool that does Ford key on engine running test.
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i agree i would suspect either the power steering pressure switch or an issue with the idle air control valve.
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try cleaning the throttle plate on both sides with choke cleaenr and iac hole first
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